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<div class="title">group </div>  </div>
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<div class="textblock"><p>The group component allows groups of elements to be combined into reusable groups. From a modelling perspective we regard them as syntactic sugar with no counterpart in OWL. However, group references act like compositors in that they allow the schema designer to indicate how many times the group may occur.</p>
<p>The minimum and maximum occurrences of the group reference are multiplied by the cardinalities of the group members. In the example below, the element 'barfoo' references a group that has no occurrences.</p>
<div class="fragment"><pre class="fragment">&lt;?xml version=<span class="stringliteral">&quot;1.0&quot;</span> encoding=<span class="stringliteral">&quot;UTF-8&quot;</span>?&gt;
&lt;xs:schema xmlns:xs=<span class="stringliteral">&quot;http://www.w3.org/2001/XMLSchema&quot;</span> 
        targetNamespace=<span class="stringliteral">&quot;http://example.org/&quot;</span> xmlns=<span class="stringliteral">&quot;http://example.org/&quot;</span>
        elementFormDefault=<span class="stringliteral">&quot;qualified&quot;</span>&gt;
        
        &lt;xs:group name=<span class="stringliteral">&quot;myGroup&quot;</span>&gt;
                &lt;xs:all&gt;
                        &lt;xs:element name=<span class="stringliteral">&quot;foo&quot;</span> /&gt;
                &lt;/xs:all&gt;
        &lt;/xs:group&gt;
        
        &lt;xs:element name=<span class="stringliteral">&quot;barfoo&quot;</span>&gt;
                &lt;xs:complexType&gt;
                        &lt;xs:group ref=<span class="stringliteral">&quot;myGroup&quot;</span> minOccurs=<span class="stringliteral">&quot;0&quot;</span> maxOccurs=<span class="stringliteral">&quot;0&quot;</span> /&gt;
                &lt;/xs:complexType&gt;
        &lt;/xs:element&gt;

&lt;/xs:schema&gt;
</pre></div> <div class="fragment"><pre class="fragment">@prefix ns2:     &lt;http:<span class="comment">//example.org/def/&gt; .</span>
@prefix rdfs:    &lt;http:<span class="comment">//www.w3.org/2000/01/rdf-schema#&gt; .</span>
@prefix ns1:     &lt;http:<span class="comment">//example.org/&gt; .</span>
@prefix xs_:     &lt;http:<span class="comment">//www.w3.org/2001/XMLSchema#&gt; .</span>
@prefix owl:     &lt;http:<span class="comment">//www.w3.org/2002/07/owl#&gt; .</span>
@prefix xsd:     &lt;http:<span class="comment">//www.w3.org/2001/XMLSchema#&gt; .</span>
@prefix rdf:     &lt;http:<span class="comment">//www.w3.org/1999/02/22-rdf-syntax-ns#&gt; .</span>
@prefix xs:      &lt;http:<span class="comment">//www.w3.org/2001/XMLSchema&gt; .</span>

ns1:foo
      a       rdf:Property .

ns1:barfoo
      a       owl:ObjectProperty ;
      rdfs:range
              [ a       owl:Class ;
                rdfs:subClassOf
                        [ a       owl:Restriction ;
                          owl:cardinality <span class="stringliteral">&quot;0&quot;</span>^^xsd:int ;
                          owl:onProperty ns1:foo
                        ]
              ] .

&lt;http:<span class="comment">//example.org/group.owl&gt;</span>
      a       owl:Ontology .
</pre></div><h2><a class="anchor" id="groupChildren"></a>
Child components</h2>
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